Azmi Rohani, Lukman Abu Bakar, Wahid Razzaly, and Siti Sarawati Johar. PENA JAUHAR SIRI 2. Penerbit UTHM, 2019. Accessed March 12, 2026. https://publisher.uthm.edu.my/omp/index.php/penerbituthm/catalog/book/232.